This prototyping shield is the best out there (well, we think so, at least), and now is even better with Version R3 - updated for the most compatibility with just about all the Arduinos! It works with UNO, Mega, Leonardo, NG, Diecimila, Duemilanove, and compatible Arduinos. Yun's and Arduino Ethernets have a chunky Ethernet jack that gets in the way of stacking, you can use the stacking headers included and it will work, just doesn't sit nice and flat. Comes as a kit of parts so you can choose how you want to configure your shield. However, it's very easy to assemble even for beginning solderers. More information & instructions are available here. Arduino and breadboards are not included! Features * Standard 0.1"x0.1" prototyping grid with big pads * Comes with Stacking headers and plain headers, choose whichever you want when soldering together * An IC pattern for adding DIP ICs up to 20 pins * Power rails down the middle and sides * A reset button and an extra general-use button * Two 3mm general-use LEDs, red and green, as well as 2 matching resistors * A pass-thru ICSP stacking header so you can stack any kind of shield on top, and/or use an AVR programmer * A surface-mount chip area for up to 14 SOIC-size parts * Compatible with tiny breadboards * Every pin is brought out! * Gold-plated pads * 2 x 0.1uF capacitors on either side for extra power stability * Fits regular Arduino headers * Dimensions (assembled): 69mm x 53mm x 13mm (2.7in x 2.1in x 0.5in) Specifications * Fits regular Arduino headers * Dimensions (assembled): 69mm x 53mm x 13mm Resources * Tutorial and Downloads https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2023-03-06 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2023-12-27 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2024-09-19 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2024-11-29 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2024-11-30 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2025-11-28 https://elecena.pl/product/22711930/adafruit-proto-shield-for-arduino-unassembled-kit-stackable-version-r3 2025-11-29